<div class="loading ">
  <div class="spinner">
    <div class="rect1"></div>
    <div class="rect2"></div>
    <div class="rect3"></div>
    <div class="rect4"></div>
    <div class="rect5"></div>
  </div>
</div>
<style>
  .loading {
    background-color: #2980b9;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #15803d;
  }

  .spinner {
    margin: 100px auto;
    width: 50px;
    height: 40px;
    text-align: center;
    font-size: 10px;
  }

  .spinner>div {
    background-color: #fff;
    height: 100%;
    width: 6px;
    display: inline-block;

    -webkit-animation: sk-stretchdelay 1.2s infinite ease-in-out;
    animation: sk-stretchdelay 1.2s infinite ease-in-out;
  }

  .spinner .rect2 {
    -webkit-animation-delay: -1.1s;
    animation-delay: -1.1s;
  }

  .spinner .rect3 {
    -webkit-animation-delay: -1.0s;
    animation-delay: -1.0s;
  }

  .spinner .rect4 {
    -webkit-animation-delay: -0.9s;
    animation-delay: -0.9s;
  }

  .spinner .rect5 {
    -webkit-animation-delay: -0.8s;
    animation-delay: -0.8s;
  }

  @-webkit-keyframes sk-stretchdelay {

    0%,
    40%,
    100% {
      -webkit-transform: scaleY(0.4)
    }

    20% {
      -webkit-transform: scaleY(1.0)
    }
  }

  @keyframes sk-stretchdelay {

    0%,
    40%,
    100% {
      transform: scaleY(0.4);
      -webkit-transform: scaleY(0.4);
    }

    20% {
      transform: scaleY(1.0);
      -webkit-transform: scaleY(1.0);
    }
  }
</style>